Evaluating Insect Resistance in Southeastern Cotton Varieties

M.E. Roof and C.C. Green


Insect resistance was evaluated in the following cotton varieties: Coker 139, Coker 320, DPL 50, DPL 90, PD-1 and PD-3. The varieties were evaluated in the field in 1989 under natural infestations of insect pests. Subplots included: (1) aldicarb at planting and no aldicarb and (2) Heliothis control and no control. The number of plants killed and severely stunted was much greater where no aldicarb was used. DPL go had significantly less thrips damage than the other varieties. Damage by Heliothis did not differ significantly between varieties. In plots which were not treated for thrips, but were treated for Heliothis, DPL 50 and DPL 90 produced the highest yields.

Reprinted from 1990 Proceedings: Beltwide Cotton Production Research Conferences pg. 206
©National Cotton Council, Memphis TN

[Main TOC] | [TOC] | [TOC by Section] | [Search] | [Help]
Previous Page [Previous] [Next] Next Page
Document last modified Sunday, Dec 6 1998